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Molten glass conveying equipment element, method for producing molten glass conveying equipment element, and glass manufacturing apparatus

A technology for melting glass and handling equipment, applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve problems such as reduced productivity and shortened equipment life, and achieve the effect of preventing deformation of the catheter

Active Publication Date: 2014-03-26
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there are problems such as a decrease in productivity and a shortened life of equipment due to repair work.

Method used

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  • Molten glass conveying equipment element, method for producing molten glass conveying equipment element, and glass manufacturing apparatus
  • Molten glass conveying equipment element, method for producing molten glass conveying equipment element, and glass manufacturing apparatus
  • Molten glass conveying equipment element, method for producing molten glass conveying equipment element, and glass manufacturing apparatus

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0115] In the preparation method of the above-mentioned slurry, the reason for using a pH adjuster when making the slurry precursor is that in order to uniformly disperse the first stabilized zirconia particles into the ion-exchanged water, the pH needs to be adjusted to be weakly alkaline (pH approx. 7 to about 9).

[0116] CaO, ammonia, potassium carbonate, etc. can be used as a pH adjuster. Among them, CaO is preferable because it is easy to handle and has little residue after heating.

[0117] When CaO is used as the pH adjuster, it is preferably 0.01 to 0.2% by weight, more preferably 0.02 to 0.1% by weight, and even more preferably 0.03 to 0.5% by weight based on the mass % of the total composition of the slurry.

[0118] In order to improve the handleability at normal temperature, an organic binder is blended into the slurry as needed.

[0119] As the organic binder, methylcellulose, liquid paraffin, polyethylene glycol and the like can be used. As an organic binder ...

experiment example 1～7

[0180] As the first particles, fully stabilized zirconia particles F1, F2 and F3 having median diameters D50 of 15 μm (D90 45 μm), 0.96 μm (D90 1.8 μm) and 0.15 μm (D90 0.9 μm), respectively, were prepared. In addition, among these particles, the particle F2 satisfies the median diameter D50 of the first stabilized zirconia particles in the present invention. The particles F1, F2, and F3 all contained 12% by mass of yttrium oxide as a stabilizer, each contained 87% by weight of zirconia, and each accounted for 95% by weight of cubic zirconia in zirconia.

[0181] Blended at a mass ratio of 76.85% for particles F1, F2, and F3, 23% for ion-exchanged water, 0.05% for CaO (pH regulator), and 0.1% for Metros (organic binder, manufactured by Shin-Etsu Chemical Co., Ltd.) , Using a zirconia tank and balls, ball mill mixing was performed for 3 hours to prepare a slurry precursor.

[0182] Here, for the slurry precursor using the particles F1 whose median diameter D50 exceeds 5 μm, th...

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Abstract

The present invention relates to a method for producing a molten glass conveying equipment element that comprises a conduit pipe structure for molten glass, said conduit pipe structure comprising at least one conduit pipe that is formed of platinum or a platinum alloy, a first ceramic structure arranged around the conduit pipe, and a second ceramic structure arranged around the first ceramic structure. The first ceramic structure is formed by filling the space between the conduit pipe and the second ceramic structure with a slurry material and sintering the slurry material at a temperature of 1,200-1,700 DEG C. The slurry material is obtained by blending first stabilized zirconia particles having a median diameter (D50) of 0.2-5 [mu]m and second stabilized zirconia particles having a median diameter (D50) of 0.2-2 mm so that the mass ratio of the first stabilized zirconia particles to the second stabilized zirconia particles (mass of first stabilized zirconia particles / mass of second stabilized zirconia particles) is 0.3-0.6. The first stabilized zirconia particles and the second stabilized zirconia particles respectively contain, in mass% relative to the total composition, 75 wt% or more of zirconium oxide, with the ratio of cubic zirconia in the zirconium oxide being 80 wt% or more, and 6-25 wt% in total of at least one oxide that serves as a stabilizer and is selected from the group consisting of yttrium oxide and cerium oxide.

Description

technical field [0001] This invention relates to the manufacturing method of the molten-glass conveyance equipment element which can be used suitably for glass manufacturing apparatuses, such as a vacuum degassing apparatus, a molten-glass conveyance equipment, and the glass manufacturing apparatus containing this molten-glass conveyance equipment element. Background technique [0002] In glass manufacturing equipment such as vacuum degassing equipment, it is required that the constituent material of the conduit for molten glass be excellent in heat resistance and corrosion resistance to molten glass. As a material satisfying this requirement, platinum or a platinum alloy is used (refer to Patent Document 1). Heat insulating bricks are arranged around the conduit of molten glass made of platinum or platinum alloy so as to surround the conduit. [0003] The thermal expansion coefficient of platinum or platinum alloy constituting the conduit is different from that of the heat...

Claims

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Application Information

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IPC IPC(8): C03B5/43C03B5/187C03B5/225C04B35/48
CPCC03B5/187C03B5/2252C03B5/43C03C3/091C03C3/093C04B35/482C04B38/00C04B2111/00431C04B2235/3208C04B2235/3225C04B2235/3229C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/5472C04B2235/762C04B2235/94C04B2235/95C04B2235/96C04B2235/9607
Inventor 浜岛和雄丹羽章文
Owner ASAHI GLASS CO LTD
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